<template>
  <div id="app">
    <div class="container">
      <!-- 顶部框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>


      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody>
          <!--  一定要记得加空格 不然会读取错误 -->
          <tr v-for="(item ,index) in list" :key="item.id">
            <td> {{ item.id }} </td>
            <td> {{ item.name }}</td>
            <!-- 如果价格超过100，就有red这个类 -->
            <td :class="{ red: item.price >= 100 }"> {{item.price}} </td>
            <td> {{item.time |dateFormat }} </td>
            <td><a href="#" @click="delGoods(index)">删除</a></td>
          </tr>
        </tbody>
          
        <tfoot v-if=" !this.list.length ">
          <tr>
            <td colspan="5" style="text-align: center">暂无数据</td>
          </tr>
        </tfoot>
           
      </table>


      <!-- 添加资产 -->
      <form class="form-inline">
        <div class="form-group">
          <div class="input-group">
            <input
              type="text"
              class="form-control"
              placeholder="资产名称"
              v-model.trim="name"
            />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group">
          <div class="input-group">
            <input
              type="text"
              class="form-control"
              placeholder="价格"
              v-model.trim.number="price"
            />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <!-- 阻止表单提交 -->
        <button @click.prevent="addGoods" class="btn btn-primary">添加资产</button>
      </form>
    </div>
  </div>
</template>


<script>
import 'bootstrap/dist/css/bootstrap.css'
export default {
  data() {
    return {
      name: '', // 名称
      price: 0, // 价格
      list: [
        { id: 100, name: '外套', price: 199, time: new Date('2010-08-12') },
        { id: 101, name: '裤子', price: 34, time: new Date('2013-09-01') },
        { id: 102, name: '鞋', price: 25.4, time: new Date('2018-11-22') },
        { id: 103, name: '头发', price: 19900, time: new Date('2020-12-12') }
      ]
    }
  },
  methods: {
    //添加商品
    addGoods() {
      if (!this.name) return alert('商品名称不能为空')
      if (!this.price) return alert('商品价格不能为0')
      const lastId = this.list[this.list.length - 1] ? this.list[this.list.length - 1].id : 99
      this.list.push({ id: lastId + 1, name: this.name, price: this.price, time: new Date() })
      this.name = ''
      this.price = ''
    },
    //删除商品
    delGoods(index) {
      console.log('删除')
      this.list.splice(index, 1)
    }
  }
}
</script>


<style >
.red {
  color: red;
}
</style>